1 00:00:17,573 --> 00:00:22,875 In 1879, amateur archaeologist Marcelino Sanz de Sautuola 2 00:00:22,875 --> 00:00:27,973 and his young daughter Maria explored a dark cave in Northern Spain. 3 00:00:27,973 --> 00:00:32,527 When Maria wondered off by herself, she made an amazing discovery. 4 00:00:32,527 --> 00:00:36,098 They were standing inside a site of ancient art, 5 00:00:36,098 --> 00:00:40,301 the walls and roofs decorated with prehistoric paintings and engravings, 6 00:00:40,301 --> 00:00:46,069 ranging from 19,000 to 35,000 years old. 7 00:00:46,069 --> 00:00:51,116 Similar marks of our ancestors have been preserved in caves all over the world. 8 00:00:51,116 --> 00:00:55,230 The oldest we've found were made up to 40,000 years ago. 9 00:00:55,230 --> 00:00:59,495 What do these images tell us about the ancient human mind 10 00:00:59,495 --> 00:01:02,421 and the lives of their creators? 11 00:01:02,421 --> 00:01:09,123 These early artists mixed minerals, clay, charcoal, and ochre with spit or animal fat 12 00:01:09,123 --> 00:01:11,665 to create paint. 13 00:01:11,665 --> 00:01:18,433 They drew with their hands and tools, like pads of moss, twigs, bones, and hair. 14 00:01:18,433 --> 00:01:22,484 In many instances, their images follow the contours of the cave 15 00:01:22,484 --> 00:01:25,190 to create depth and shade. 16 00:01:25,190 --> 00:01:27,958 The most common depictions are of geometric shapes, 17 00:01:27,958 --> 00:01:35,007 followed by large mammals, like bison, horses, mammoths, deer, and boars. 18 00:01:35,007 --> 00:01:40,058 Human figures appear rarely, as well as occasional hand prints. 19 00:01:40,058 --> 00:01:44,065 Some have theorized that these artworks are the creation of hunters, 20 00:01:44,065 --> 00:01:47,540 or of holy men in trance-like states. 21 00:01:47,540 --> 00:01:52,588 And we've found examples created by men, women, and even children. 22 00:01:52,588 --> 00:01:54,629 And why did they create this art? 23 00:01:54,629 --> 00:01:57,928 Perhaps they were documenting what they knew about the natural world, 24 00:01:57,928 --> 00:01:59,702 like modern scientists, 25 00:01:59,702 --> 00:02:02,806 or marking their tribal territory. 26 00:02:02,806 --> 00:02:06,193 Maybe the images were the culmination of sacred hunting rituals 27 00:02:06,193 --> 00:02:08,848 or spiritual journeys. 28 00:02:08,848 --> 00:02:15,078 Or could they be art for art's sake, the sheer joy and fulfillment of creation? 29 00:02:15,078 --> 00:02:17,628 As with many unsolved mysteries of the ancient world, 30 00:02:17,628 --> 00:02:19,925 we may never know for sure, 31 00:02:19,925 --> 00:02:23,155 barring the invention of a time machine, that is. 32 00:02:23,159 --> 00:02:25,412 But while the answers remain elusive, 33 00:02:25,412 --> 00:02:29,969 these images are our earliest proof of human communication, 34 00:02:29,969 --> 00:02:32,805 testifying to the human capacity for creativity 35 00:02:32,805 --> 00:02:36,144 thousands of years before writing. 36 00:02:36,144 --> 00:02:41,548 They are a distinct visual language that imagines the world outside the self, 37 00:02:41,548 --> 00:02:43,248 just like modern art forms, 38 00:02:43,248 --> 00:02:47,487 from graffiti and painting to animated virtual-reality caves.